Air-brake.



G. B. WOLF.

AIR BRAKE.

APPLICATION FILED JUNE'1,1912.

1,1 18,520. Patented Nov. 24, 1914.

A juf By La @of 5.

A TTHNEY GUSTAV B. WOLF, 0F SAN ANTONIO, TEXAS.

AIR-BRAKE.

Specification of Letters Patent.

Patented Nov. 24, 1914.

Application med :une 7, 1912. serial no. 702,14o.

To all whom it may concern.'

Beit known that I, Gtis'rav B. Wonr, citizen of the United States, residing at San Antonio, in the county of Bexar and State of Texas, have invented certain new and useful Improvements in Air-Brakes, of which the following is a specification.

This invention relates to improvements in air brakes.

The objects of the invention are; the provision of means'whereby the air pressure in the auxiliary reservoir is reduced in applying the brakes, but no air is exhausted from the train pipe except to restore the pressure in the auxiliary, thus permitting the air piimp to operate whenever necessary and continuously if required; the provision of means whereby the `ordinary 4brake system -may be used without interference; the provision whereby a specified air pressure may be maintained in the brake cylinder and increased or diminished at will; and the provision whereby the brakes on a number of cars may be applied or released instantly and applied or released simultaneously without exhausting the train pipe.

A still further object of the invention is to provide an apparatus that will be strong, durable, eflicient, and simple and comparatively inexpensive to construct and maintain, also one-in which the several parts will not be likely to get out of working order.

With the above and other objects in view the invention has relation to certain novel features of construction and operation, an example of which is described in the following specification and illustrated in the accompanying drawings, wherein:

Figure 1 is an assembled view of the apparatus, Fig. 2 is a vertical sectional view of one of the magnetic controlling valves, Fig. 3 is a horizontal cross section on the line 8-8 of Fig. 2, Fig. 4 is a detail of one of the electrical contacts, Fig. 5 is sectional detail of one of the check valves, and Fig. 6 is a sectional detail of the other check valve.

In the drawings the numeral l designates the train pipe, 2 the branch pipe leading to the triple valve 3 mounted on the auxiliary reservoir 4, which is connected to the brake cylinder 5, all of which are now in common use and form part of what is known as a standard equipment. From this it will be apparent that in employing this invention no part of the usual brake apparatus is omitted, but as will be herein after set forth certain parts may be omitted, thus making it possible to use the invention in connection with the present apparatus without altering the same, or employing it with certain parts of the present equipment omitted.

Adjacent the auxiliary reservoir and the brake cylinder inagneticcontrolling valves A and B are located. substantially alike, a description of one will suflice for both. The valve comprises a casing 6 cylindrical in form and having a ncek T at its upper central portion. A cap 8 is screw-threaded onto the neck and may be removed when access is desired. The casing is flanged at its bottom and receives the Hanged portion of a valve cup-9 which is secured thereto. Anietallic shell 10 fits snu ly in the casing, being inserted from the ottoni. This shell is supported in place by an upstanding flange 11 projecting into the casing as shown in Fig. 2. The shell has an integral core 20 projecting thereinto and also extending into the neck 7. A washer 12 of insulating material is placed on top of the shell and surrounds the core. On this washer a pair of opposed spring contacts 14 are fastened as shown in Fig. 2.' These contacts are arranged to engage the heads of screws 15 securing binding posts 16 on top of the valve casing, the screws and posts being insulated from the casing. The terminal wires of a solenoid 17 are connected through the shell and washer to the contacts 1l. The solenoid 17 is mounted on a metallic sleeve 18 which receives the core 20 of the shell. A11 armature 19 is slidable in the lower end of the sleeve and carries a valve disk 21 from the center of which a cylindrical valve 22 depends.

The valve has its lower end pointed so as to engage a valve seat 23 formed at the bottom of a valve well 24 formed in the valve cup 9. The valve 22 has radiating verticall guide flanges 25 which maintain it in position during its operation. A teat 26 depends from the cup 9 and :is provided with a central passage terminating at the valve seat. The cup is provided with a horizontal passage 27 extending from the valve well to the outside of said cup. In connecting the apparatus a pipe 28 extending from the auxiliary reservoir 4 is connected in the valve cup 9 tothe passage 27 whereby air at auxiliary pressure is delivered to the valve well 24. The `valve 22 is held on its seat by a plunger rod 29 slidable through the core 20 As these valves are l pressure above and below the valve disk 21.

To the teat 26 of the valve A a pipe 31 is connected. This pipe extends to a check valve casing 32 open at its upper end as shown in F ig. 6. In the casing 32 just under the entrance of the pipe 31 a transverse partition 33 is xed and is provided with an aperture at its center. Just under the partition a pipe 34 is connected and leads toa check valve 35. Above the pipe 31 a pipe 36 leadsfrom the exhaust port of the triple valve and is connected in the casing and partially closed at the casing as shown in F ig. 6. Opposite the opening of the pipe 36 a check valve 37 is mounted and arranged to close upward against a seat 38.

' By observing Fig. 6 it will be seen that ex haust air from the triple valve is free to pass throughthe pipe 36 past the valve 37 and to atmosphere through the top of the vcheck valve casing 32; thus permitting the ordinaryy apparatus to be operated. Should the valve 22 be raised, air from the auxilliary reservoir will pass through the pipe 31 to the casing 32 and owing to the small aperture in the partition 33, will first seat the valve 37 thus closing the exhaust and then flow through said aperture to the pipe 34. Said air flowing through the pipe 34 lifts and passes the check valve 35 and enters a pipe 39 which extends to the passage 27 of the valve B. 1F rom the pipe 39 a brake cylinder pipe 40 leads to the cylinder 5. The air thus delivered can not pass the valve 22 of the valve B and Hows into the brake cylinder thus forcing the brakeI piston outward and applying the brakes. When the valve 22 of valve A is closed the back pressure from the brake cylinder closes check valve 35 and the brakes are thus held applied.

To release the brakes it is merely neces sary to raise the valve 22 of the valve B which permits air from the brake cylinder to pass out through the teat 26 of said valve B, said 'teat being open to atmosphere. A. portion of the air ressure may be retained 1n the brake cylin er by closing said valve 1,1 iaeao and the armature 19 drawn in to sleeve 18 thus raising the valve 22. As soon as the circuit is opened the spring of the plug 30 will force the valve to its seat, although said valve would drop as soon as the current was cut out of the solenoid. Vhenthe circuit D is closed a similar operation will be performed in the valve B wliich'operates in the same manner.

lVliat ll claim is:

1. ln an air brake, the combination with an auxiliary reservoir, a brake cylinder and a triple valve, a pair of controlling valves, one connected with the reservoir and the other having an opening to atmosphere, an air conductor between the valves having connection with the brake cylinder, a check valve interposed between the first named valve and brake cylinder connection, a check valve casing connected tothe air conductor and open to atmosphere, apipe leading from the triple valve exhaust port to the valve casing, and a check valve in the said casing.

2. In a fluid pressure brake, the combination with an auxiliary reservoir, and a brake cylinder, of a pair of controlling devices each having communication with the brake cylinder and one having communication with the auxiliary reservoir and the other 4having a portopen to atmosphere, a valve operating in each device between the inlet and outlet thereofA and having a disk connected to the valve above said lnlet and outlet, a solenoid in each device above the disk and provided with an armature connected to the disk, and a spring exerting a` downward pressure on the armature.

In testimony whereof I have signed my name to this specication in the presence of two subscribing witnesses.

GUS'llAV B. WOLF.

Witnesses:

W. D. GERMANY, A. T. Wma. 

